Wrench



M. A. CROZIER.

wnsucfi. APPLICATION FILED SEPT.27I 1919.

Patented Mar. 8, 1921 4 awvewboi MICHAEL A. QR

3& Gum 140% UNITED STATES MICHAEL A. CROZIER, OF NEW YORK, N. Y.

WRENCH.

Specification of Letters ratent.

Patented Mar. 8, 1921.

Application filed September 27, 1919. Serial No. 326,916.

To all whom it may concern:

Be it known that 1, MICHAEL A. Cnozrnn, a citizen of the United States, and a resident of New York city, borough of the Bronx, in the county and State of New York, have invented certain new and useful Improvements in \Vrenches, of which the following is a full, clear, and exact description.

Among the principal objects which the present invention has in view are: To simplify and cheapen the construction of wrenches of the character mentioned; to adapt the wrench for employment on various sizes of nuts; and to rovide a wrench which is quickly and readily adjustable to the work to be performed by it.

Drawings.

Figure 1 is a side view of a wrench, con structed and arranged in accordance with the present invention, showing by broken lines, in conjunction therewith, a nut engaged thereby.

Fig. 2 is a detail View showing a fragment of one of the jaws of which the wrench is constructed.

Fig. 3 is an edge view of the same.

Fig. 4 shows a modified form of the invention, the same being adapted for wrenchheads of different sizes at the opposite ends of the handle bar of the wrench.

Description.

As shown in the drawing, the wrench consists primarily of two cooperating, and preferably duplicated side members 9 and 10. Each member has a half-gripping head, indicated in the drawings by the numerals 11 and 12, respectively. Each head has at the back thereof, a series of gear-teeth 13. At ,the extremity of the extension 14:, of the body of each of the wrench members. is a tooth 15. The teeth 15, one on each of the wrench members 9 and 10, engage the various teeth 13 on the wrench-heads of the opposite member, thereby insuring the wrench-heads against spreading or slipping under tension of the work in which they are employed.

The two members 9 and are united, in service, by means of a stove-bolt 16, the shank of which extends through slots 17. The slots 17 in both of the members 9 and 10 register when they are placed in service relation. A nut 18 is employed to hold the bolt 16 in position.

In service the handle bars 19 and 20 are swung apart pivoting on the bolt 16. The heads 11 and 12 are then adjusted to the nut upon which the wrench is to engage. T he handle bars 19 and 20 are then swung together until the teeth on the heads of the wrench members engage one of the teeth 13 at the back of the wrench-heads.

The handle bars 19 and will now be found to be in position, so closely related, that the hand of the operator will hold the same together and hold the teeth 15 in en gagement together with the gear-teeth 13, thereby maintaining the service relation of the wrench jaws, While the force is being applied to turning movement for the nut, or other member with which the said jaws are engaged.

In the modified form of the invention shown in Fig. 4:, the bolt 16 is disposer in slots in the center of the handle bars 21 and 22. The handle bars 21 and 22 are shaped as shown in the drawings to a double curvature, generally known in the trade as S-shaped. In service the end of the wrench, not engaged with the nut, is usually em ployed for applying force to the turning movement of the nut with which the wrench jaws happen to be engaged. By reason of this, the jaws are pivoted on the bolt 16 at the middle of the handle bars to hold the teeth 23 in engagement with the teeth 24 with which the wrench-heads, in the modified form, are provided.

The teeth 23 and 24 are of the ratchettooth character, and the teeth 23 instead of being single are shown in multiple form. The function of the teeth 23 and the teeth 2 1-, and the oflice performed thereby, in the service of the wrench, is that above described with reference to the teeth 18 and 15.

In the preferred form of the invention, where the handle bars 19 and 20 are disposed in the same plane, the members 9 and 10 are cut away to form the recesses 25 for the other half or member of the wrench.

It is obvious that when wrenches are thus constructed, the cooperating parts are duplicated and the construction therefor is very much simplified and cheapened. While the handle, may be equally used in this form of construction.

Claims.

1. A Wrench com risin a luralit of a 7 P p votally connected members, each member having a handle portion and a Wrench-head ortion for en 'a un different faces of a D b b V nut-head; and means for holding said heads in adjusted relation, said means embodying locking members disposed adjacent the engaging portion of said wrench-head, and between the same and the pivotal connection, whereby the pressure of thehand gripping the wrench maintains said locking members in engagement.

2. .A wrench comprising, a plurality of pivotally connected members, each member having a handle portion and wrench-head portion for engaging different faces of a nut-head; and means for holding said heads in adjusted relation; said means embodying cooperating toothed portions at the rearof said heads for mutual engagement, said toothed portions being intermediate the pivotal connection and the nut-engaging portions of said head, whereby the grip of the hand holdsthe toothed portions in engagement.

3. A wrench comprising, a plurality of duplicate members, each member having a handle portion and a wrench-head portion, said wrench-head portions cooperating to form Wrench-head openings, each member 'havingtooth-engaging edges cooperating to hold the wrench-head portions from spread-.

ing in service; and-a pivotal connection for sald members, loosely holding the same in service, to admit of lateral adjustment of said members. 7 4 4. A wrench comprising, a plurality of duplicate members, each member having a handle portion and a wrench-head portion, said wrench-head portions cooperating to form wrench-head openings, each member 5 having tooth-engaging edges cooperating to hold the wrench-head portions from spreading in service; and a pivotal connection for said members, loosely holding the same in service, to admit of lateral adjustment of 5 said members, said pivotal connection embodying corresponding slots formed in said duplicate members for register in service; and a bolt removably mounted in said slots.

5. A wrench comprising, a plurality of 6 duplicate members, each having a handle portion, a fragmentary head portion, and an engaging extension, each of said head portions having at the inner side thereof, a series of engaging members, and each exten- 6 sion having engaging members for cooperating with said engaging members at the inner side of the head portion of the opposite wrench member; and means for detachgbly, pivotally connecting said wrench memers.

6. A wrench comprising a pair of members provided with handles and slidably fulcrumed in relation to each other, a jaw fixedly mounted on each member in opposed relation to eachother, each jaw having a portion projecting laterally beyond the adjacent side of each member, and gripping means on the under side of said projecting portion and oneach member so positioned that the gripping means on one member will interlock with the gripping means on the projecting portion of the jaw of the other member when oppositely acting pressures are supplied to saidhandles.

MICHAEL A. CROZIER. 

